Answer:
10.68%
Explanation:
Total no of racers = 290
No of racers that completed the race = 259
No of racers that gave up = 28
No of racers that were disqualified = 3
No of racers that did not complete the marathon = 28 + 3 = 31
We need to find the percentage of the racers did not complete the marathon. It can be given by :

So, the percentage of the racers that did not complete the marathon is 10.68%.